[PATCH v4 07/10] pmem: switch from ioremap_wt to memremap

Dan Williams
2015-08-11T03:44:18Z

In preparation for deprecating ioremap_wt() convert its usage in
the PMEM API to memremap.

Acked-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
include/linux/pmem.h | 2 +-
tools/testing/nvdimm/Kbuild | 4 ++--
tools/testing/nvdimm/test/iomap.c | 34 +++++++++++++++++++++++++---------
3 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/include/linux/pmem.h b/include/linux/pmem.h
index d2114045a6c4..1bf74c735fa0 100644
--- a/include/linux/pmem.h
+++ b/include/linux/pmem.h
@@ -94,7 +94,7 @@ static void default_memcpy_to_pmem(void __pmem *dst, const void *src,
static void __pmem *default_memremap_pmem(resource_size_t offset,
unsigned long size)
{
- return (void __pmem __force *)ioremap_wt(offset, size);
+ return (void __pmem *) memremap(offset, size, MEMREMAP_WT);
}

/**
diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild
index de2912ea78e8..8032a49f7873 100644
--- a/tools/testing/nvdimm/Kbuild
+++ b/tools/testing/nvdimm/Kbuild
@@ -1,7 +1,7 @@
-ldflags-y += --wrap=ioremap_wt
ldflags-y += --wrap=ioremap_wc
ldflags-y += --wrap=devm_ioremap_nocache
-ldflags-y += --wrap=arch_memremap_pmem
+ldflags-y += --wrap=memremap
+ldflags-y += --wrap=memunmap
ldflags-y += --wrap=ioremap_nocache
ldflags-y += --wrap=iounmap
ldflags-y += --wrap=__request_region
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index f8486f98f860..21288f34a5ca 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -80,11 +80,20 @@ void __iomem *__wrap_devm_ioremap_nocache(struct device *dev,
}
EXPORT_SYMBOL(__wrap_devm_ioremap_nocache);

-void *__wrap_arch_memremap_pmem(resource_size_t offset, size_t size)
+void *__wrap_memremap(resource_size_t offset, size_t size,
+ unsigned long flags)
{
- return __nfit_test_ioremap(offset, size, arch_memremap_pmem);
+ struct nfit_test_resource *nfit_res;
+
+ rcu_read_lock();
+ nfit_res = get_nfit_res(offset);
+ rcu_read_unlock();
+ if (nfit_res)
+ return (void __iomem *) nfit_res->buf + offset
+ - nfit_res->res->start;
+ return memremap(offset, size, flags);
}
-EXPORT_SYMBOL(__wrap_arch_memremap_pmem);
+EXPORT_SYMBOL(__wrap_memremap);

void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
{
@@ -92,12 +101,6 @@ void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
}
EXPORT_SYMBOL(__wrap_ioremap_nocache);

-void __iomem *__wrap_ioremap_wt(resource_size_t offset, unsigned long size)
-{
- return __nfit_test_ioremap(offset, size, ioremap_wt);
-}
-EXPORT_SYMBOL(__wrap_ioremap_wt);
-
void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
{
return __nfit_test_ioremap(offset, size, ioremap_wc);
@@ -117,6 +120,19 @@ void __wrap_iounmap(volatile void __iomem *addr)
}
EXPORT_SYMBOL(__wrap_iounmap);

+void __wrap_memunmap(void *addr)
+{
+ struct nfit_test_resource *nfit_res;
+
+ rcu_read_lock();
+ nfit_res = get_nfit_res((unsigned long) addr);
+ rcu_read_unlock();
+ if (nfit_res)
+ return;
+ return memunmap(addr);
+}
+EXPORT_SYMBOL(__wrap_memunmap);
+
struct resource *__wrap___request_region(struct resource *parent,
resource_size_t start, resource_size_t n, const char *name,
int flags)